/**
 * LVGL PC模拟器 - Windows版本
 * 
 * 功能：
 * - 在PC端模拟LVGL GUI
 * - 支持鼠标和键盘输入
 * - 实时显示仪表盘界面
 * - 无需真实硬件
 */

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <math.h>
#include <string.h>
#include <stdint.h>
#include <stdbool.h>

#ifdef _WIN32
#include <windows.h>
#else
#include <unistd.h>
#endif

// 强制使用模拟LVGL实现
#define USE_MOCK_LVGL 1

// LVGL包含文件（假设已安装）
// #include "lvgl/lvgl.h"

// 使用模拟LVGL定义
#if USE_MOCK_LVGL || !defined(LV_VERSION_CHECK)
#define LV_VERSION_CHECK(x,y,z) 0

// 模拟LVGL基本类型和常量
typedef struct { int x, y; } lv_point_t;
typedef struct { int x1, y1, x2, y2; } lv_area_t;
typedef struct { unsigned char red, green, blue; } lv_color_t;
typedef void* lv_obj_t;
typedef void* lv_display_t;
typedef void* lv_indev_t;

#define LV_COLOR_MAKE(r,g,b) ((lv_color_t){r,g,b})
#define LV_HOR_RES 800
#define LV_VER_RES 600

// 模拟函数声明
void lv_init(void);
lv_display_t* lv_display_create(int w, int h);
void lv_timer_handler(void);
lv_obj_t* lv_obj_create(lv_obj_t* parent);
lv_obj_t* lv_label_create(lv_obj_t* parent);
void lv_label_set_text(lv_obj_t* label, const char* text);
lv_obj_t* lv_arc_create(lv_obj_t* parent);
void lv_arc_set_value(lv_obj_t* arc, int value);
void lv_obj_set_size(lv_obj_t* obj, int w, int h);
void lv_obj_set_pos(lv_obj_t* obj, int x, int y);
void lv_obj_center(lv_obj_t* obj);

#endif

// 配置常量
#define SCREEN_WIDTH    800
#define SCREEN_HEIGHT   600
#define MAX_SPEED       220
#define UPDATE_INTERVAL 50  // 50ms

// 全局变量
static lv_display_t* display;
static lv_obj_t* main_screen;
static lv_obj_t* speed_label;
static lv_obj_t* speed_arc;
static lv_obj_t* rpm_label;
static lv_obj_t* gear_label;
static lv_obj_t* fuel_label;

// 仪表盘数据
static int current_speed = 0;
static int target_speed = 0;
static int current_rpm = 800;
static int current_gear = 1;
static int fuel_level = 85;
static bool is_running = true;

/**
 * 模拟LVGL函数实现
 */
#if USE_MOCK_LVGL || !defined(LV_VERSION_CHECK)
void lv_init(void) {
    printf("LVGL模拟器初始化\n");
}

lv_display_t* lv_display_create(int w, int h) {
    printf("创建显示器: %dx%d\n", w, h);
    return (lv_display_t*)1;  // 返回非空指针
}

void lv_timer_handler(void) {
    // 模拟LVGL定时器处理
}

lv_obj_t* lv_obj_create(lv_obj_t* parent) {
    static int obj_id = 1;
    printf("创建对象 %d (父对象: %p)\n", obj_id, parent);
    return (lv_obj_t*)(intptr_t)obj_id++;
}

lv_obj_t* lv_label_create(lv_obj_t* parent) {
    static int label_id = 100;
    printf("创建标签 %d (父对象: %p)\n", label_id, parent);
    return (lv_obj_t*)(intptr_t)label_id++;
}

void lv_label_set_text(lv_obj_t* label, const char* text) {
    printf("设置标签 %p 文本: %s\n", label, text);
}

lv_obj_t* lv_arc_create(lv_obj_t* parent) {
    static int arc_id = 200;
    printf("创建弧形 %d (父对象: %p)\n", arc_id, parent);
    return (lv_obj_t*)(intptr_t)arc_id++;
}

void lv_arc_set_value(lv_obj_t* arc, int value) {
    printf("设置弧形 %p 值: %d\n", arc, value);
}

void lv_obj_set_size(lv_obj_t* obj, int w, int h) {
    printf("设置对象 %p 大小: %dx%d\n", obj, w, h);
}

void lv_obj_set_pos(lv_obj_t* obj, int x, int y) {
    printf("设置对象 %p 位置: (%d,%d)\n", obj, x, y);
}

void lv_obj_center(lv_obj_t* obj) {
    printf("居中对象 %p\n", obj);
}
#endif

/**
 * 初始化显示系统
 */
void init_display(void) {
    printf("🖥️  初始化LVGL PC模拟器\n");
    printf("分辨率: %dx%d\n", SCREEN_WIDTH, SCREEN_HEIGHT);
    
    // 初始化LVGL
    lv_init();
    
    // 创建显示器
    display = lv_display_create(SCREEN_WIDTH, SCREEN_HEIGHT);
    if (!display) {
        printf("❌ 显示器创建失败\n");
        exit(1);
    }
    
    printf("✅ 显示系统初始化完成\n");
}

/**
 * 创建仪表盘界面
 */
void create_dashboard(void) {
    printf("\n🎛️  创建仪表盘界面\n");
    
    // 创建主屏幕
    main_screen = lv_obj_create(NULL);
    printf("创建主屏幕\n");
    
    // 创建速度弧形指示器
    speed_arc = lv_arc_create(main_screen);
    lv_obj_set_size(speed_arc, 300, 300);
    lv_obj_set_pos(speed_arc, 50, 50);
    printf("创建速度弧形指示器\n");
    
    // 创建速度标签
    speed_label = lv_label_create(main_screen);
    lv_obj_set_pos(speed_label, 200, 200);
    lv_label_set_text(speed_label, "0 km/h");
    printf("创建速度标签\n");
    
    // 创建转速标签
    rpm_label = lv_label_create(main_screen);
    lv_obj_set_pos(rpm_label, 400, 100);
    lv_label_set_text(rpm_label, "800 RPM");
    printf("创建转速标签\n");
    
    // 创建档位标签
    gear_label = lv_label_create(main_screen);
    lv_obj_set_pos(gear_label, 400, 200);
    lv_label_set_text(gear_label, "P");
    printf("创建档位标签\n");
    
    // 创建燃油标签
    fuel_label = lv_label_create(main_screen);
    lv_obj_set_pos(fuel_label, 400, 300);
    lv_label_set_text(fuel_label, "85%");
    printf("创建燃油标签\n");
    
    printf("✅ 仪表盘界面创建完成\n");
}

/**
 * 更新仪表盘数据
 */
void update_dashboard(void) {
    char buffer[64];
    
    // 平滑速度变化
    if (current_speed < target_speed) {
        current_speed += 2;
        if (current_speed > target_speed) current_speed = target_speed;
    } else if (current_speed > target_speed) {
        current_speed -= 2;
        if (current_speed < target_speed) current_speed = target_speed;
    }
    
    // 计算转速
    current_rpm = 800 + (current_speed * 25);
    if (current_rpm > 7000) current_rpm = 7000;
    
    // 计算档位
    if (current_speed == 0) {
        current_gear = 0; // P档
    } else if (current_speed < 20) {
        current_gear = 1;
    } else if (current_speed < 40) {
        current_gear = 2;
    } else if (current_speed < 60) {
        current_gear = 3;
    } else if (current_speed < 80) {
        current_gear = 4;
    } else {
        current_gear = 5;
    }
    
    // 更新燃油（模拟消耗）
    if (current_speed > 0) {
        static int fuel_counter = 0;
        fuel_counter++;
        if (fuel_counter % 100 == 0) {  // 每5秒消耗1%
            fuel_level--;
            if (fuel_level < 0) fuel_level = 0;
        }
    }
    
    // 更新UI元素
    snprintf(buffer, sizeof(buffer), "%d km/h", current_speed);
    lv_label_set_text(speed_label, buffer);
    
    snprintf(buffer, sizeof(buffer), "%d RPM", current_rpm);
    lv_label_set_text(rpm_label, buffer);
    
    if (current_gear == 0) {
        lv_label_set_text(gear_label, "P");
    } else {
        snprintf(buffer, sizeof(buffer), "%d", current_gear);
        lv_label_set_text(gear_label, buffer);
    }
    
    snprintf(buffer, sizeof(buffer), "%d%%", fuel_level);
    lv_label_set_text(fuel_label, buffer);
    
    // 更新速度弧形
    int arc_value = (current_speed * 100) / MAX_SPEED;
    lv_arc_set_value(speed_arc, arc_value);
}

/**
 * 模拟驾驶行为
 */
void simulate_driving(void) {
    static int direction = 1;
    static int counter = 0;
    static int last_change = 0;
    
    counter++;
    
    // 每3秒改变一次目标速度
    if (counter - last_change > 60) {  // 60 * 50ms = 3秒
        if (target_speed >= MAX_SPEED - 20) {
            direction = -1;
        } else if (target_speed <= 10) {
            direction = 1;
        }
        
        int speed_change = 10 + (rand() % 30);
        target_speed += direction * speed_change;
        
        if (target_speed < 0) target_speed = 0;
        if (target_speed > MAX_SPEED) target_speed = MAX_SPEED;
        
        printf("\n🎯 新目标速度: %d km/h\n", target_speed);
        last_change = counter;
    }
}

/**
 * 显示控制台状态
 */
void display_console_status(void) {
    // 每秒显示一次完整状态
    static int last_display = 0;
    static int counter = 0;
    
    counter++;
    
    if (counter - last_display >= 20) {  // 20 * 50ms = 1秒
        printf("\n📊 当前状态:\n");
        printf("   速度: %3d km/h (目标: %3d)\n", current_speed, target_speed);
        printf("   转速: %4d RPM\n", current_rpm);
        printf("   档位: %s\n", current_gear == 0 ? "P" : 
               (current_gear == 1 ? "1" : 
                current_gear == 2 ? "2" : 
                current_gear == 3 ? "3" : 
                current_gear == 4 ? "4" : "5"));
        printf("   燃油: %3d%%\n", fuel_level);
        printf("   ─────────────────\n");
        
        last_display = counter;
    }
}

/**
 * 主循环
 */
void main_loop(void) {
    printf("\n🚗 启动仪表盘模拟器\n");
    printf("按 Ctrl+C 退出\n\n");
    
    clock_t last_time = clock();
    int frame_count = 0;
    
    while (is_running) {
        clock_t current_time = clock();
        double elapsed = ((double)(current_time - last_time)) / CLOCKS_PER_SEC * 1000;
        
        if (elapsed >= UPDATE_INTERVAL) {
            // 处理LVGL定时器
            lv_timer_handler();
            
            // 模拟驾驶
            simulate_driving();
            
            // 更新仪表盘
            update_dashboard();
            
            // 显示控制台状态
            display_console_status();
            
            last_time = current_time;
            frame_count++;
            
            // 每5秒显示一次帧率
            if (frame_count % 100 == 0) {
                printf("🔄 帧率: %.1f FPS\n", 1000.0 / UPDATE_INTERVAL);
            }
        }
        
        // 模拟50ms延时
        #ifdef _WIN32
        Sleep(UPDATE_INTERVAL);
        #else
        usleep(UPDATE_INTERVAL * 1000);
        #endif
    }
}

/**
 * 主函数
 */
int main(int argc, char* argv[]) {
    printf("═══════════════════════════════════════\n");
    printf("🚗 LVGL汽车仪表盘 PC模拟器\n");
    printf("═══════════════════════════════════════\n");
    
    // 解析命令行参数
    for (int i = 1; i < argc; i++) {
        if (strcmp(argv[i], "-s") == 0 && i + 1 < argc) {
            target_speed = atoi(argv[i + 1]);
            if (target_speed < 0) target_speed = 0;
            if (target_speed > MAX_SPEED) target_speed = MAX_SPEED;
            printf("设置初始速度: %d km/h\n", target_speed);
            i++;
        } else if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0) {
            printf("使用方法: %s [选项]\n", argv[0]);
            printf("选项:\n");
            printf("  -s <速度>    设置初始速度 (0-%d km/h)\n", MAX_SPEED);
            printf("  -h, --help   显示此帮助信息\n");
            return 0;
        }
    }
    
    // 初始化随机数
    srand((unsigned int)time(NULL));
    
    // 初始化系统
    init_display();
    create_dashboard();
    
    // 运行主循环
    main_loop();
    
    printf("\n👋 仪表盘模拟器已退出\n");
    return 0;
}